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Fix: Pillow error when uploading RGBA image (#3325) #6241

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Dec 2, 2019
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Fix: Pillow error when uploading RGBA image (#3325) #6241

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1 change: 1 addition & 0 deletions changelog.d/6241.bugfix
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Fix error from the Pillow library when uploading RGBA images.
5 changes: 4 additions & 1 deletion synapse/rest/media/v1/thumbnailer.py
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Expand Up @@ -129,5 +129,8 @@ def crop(self, width, height, output_type):

def _encode_image(self, output_image, output_type):
output_bytes_io = BytesIO()
output_image.save(output_bytes_io, self.FORMATS[output_type], quality=80)
fmt = self.FORMATS[output_type]
if fmt == "JPEG":
output_image = output_image.convert("RGB")
output_image.save(output_bytes_io, fmt, quality=80)
return output_bytes_io